Materials Literature
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The polarizability and redox properties for the tetranuclear vanadium-oxide-carboxylates have been investigated using density functional theory (DFT). These so-called inorganic crown ethers possess large polarizabilities, which are equivalent to fullerene and generate large polarization on the guest anions into the ho…
A method that significantly improves the charge-transfer barrier properties of self-assembled n-alkanethiol films on polycrystalline copper is presented in this paper. Chemically-formed films were further modified electrochemically by repetitive potentiodynamic cycling in ethanolic solutions containing small quantitie…
Reactions of 2,6-diacetylpyridine dioxime (dapdoH₂) with Mn(NO₃)₂ or Mn(SO₃CF₃)₂ under a variety of conditions or co-ligands yield compounds with the formula [Mn₆O₂(OMe)₂(dapdo)₂(dapdoH)₄](X)₂ in which X = NO₃⁻ (1) or SO₃CF₃⁻ (2), [Mn₈O₂(dapdo)₆(NO₃)₂]·H₂O (3) and [Mn(dapdoH₂)(N₃)₂](n) (4). Compounds 1, 3 and 4 were s…
NiTi shape memory alloys are considered to be difficult to machine. Dimensional accuracy can hardly be met especially in micro-machining. Being a non-contact tool and therefore independent from machining forces, the laser is a promising alternative for manufacturing NiTi micro-parts. This paper presents research resul…
Polymeric nanofibers fabricated via electrospinning are regarded as promising scaffolds for biomimicking a native extracellular matrix. However, electrospun scaffolds have poor porosity, resulting in cells being unable to infiltrate into the scaffolds but grow only on its surface. In this study, we modified regular el…
Walnut-like structures made up of a polyaniline (PANI) nanofiber network and polystyrene (PS) microspheres are successfully fabricated by a novel approach, “competitive adsorption–restricted polymerization”. In the reaction system, PS microspheres are simultaneously encapsulated by cationic surfactant and aniline hydr…
Chitosan is a biocompatible, biodegradable and non-toxic material. It is also an advanced material used for wound dressings, drug and gene delivery, and tissue engineering. In this study, we treated chitosan film with argon plasma and characterized both its physical and chemical properties. We found that argon plasma…
Multi‐walled carbon nanotubes (MWNTs) were hydrogenated by using lithium in ethylenediamine under Benkeser's conditions, which is convenient due to the avoidance of liquid ammonia used in the classical Birch reaction. The hydrogenated MWNTs were characterized by Raman, infrared spectroscopy, transmission electron micr…
Life prediction of steel structure in marine environment is a challenging task for design and corrosion engineers for existing structures as well as new structures to be constructed. The rate of marine corrosion is a complex function of many parameters of fluid properties and chemistry of seawater. The major parameter…
Influence of SiC composition with different particle size on mechanical properties and microstructure of reaction-bonded SiC have been investigated using infiltration process of liquid Si. SiC specimens were prepared by reaction-bonding sintering at 1620°C in vacuum using different SiC–C composition. Reaction-bonded S…
The rigidity, conjugation, and shape-persistent architectures of aryl ethynyls of V, Y, and X shapes serve as an ideal model system for defining interparticle structures, which have been demonstrated for the mediated assembly of gold nanoparticles.
Joining of silicon nitride parts by a silicon nitride joint without mechanical pressure was attempted. Reaction-bonded silicon nitride (RBSN) parts were joined using a silicon slurry by a slip-cast technique, followed by reaction bonding and post-sintering. The sintering process changed the original RBSN parts and the…
This paper suggests a theoretical model to estimate Young's modulus of green composites reinforced by natural fiber twisted yarns considering a migration structure. First, we made fully green composites using biodegradable resins and ramie twisted yarns to develop a biodegradable material, and then investigated the ef…
Photoinduced reduction, resulting in nanoparticle formation, and heat-induced oxidation of doped silver have been demonstrated in silsesquioxane (RSiO(3/2)) and RSiO(3/2)-TiO(2) films (R = methyl, vinyl, and glycidoxypropyl) synthesized via the sol-gel method. The occurrence of redox behavior in the doped silver, i.e.…
For the first time, an open-framework oxysalt of trivalent vanadium is demonstrated, prepared from a single tetravalent vanadium source under acidic hydrothermal conditions. The borate-incorporated structure features intersecting 2D 16R channels and unusual solid-state redox properties confirmed by K-edge XANES, EPR s…
The results of thermodynamic analysis and characterization of some alloys in Bi-Cu-Sb lead-free solder system are presented in this paper. Thermodynamic analysis was done using general solution model, while optic microscopy, hardness and electroconductivity measurements were used in order to determine structural, mech…
The stress transfer ability at the fiber–matrix interface of wood fiber composites is known to affect the mechanical properties of the composite. The evaluation of interface properties at the level of individual fibers is however difficult due to the small dimensions and variability of the fibers. The dynamical mechan…
Homo- and heterometallic octanuclear complexes of formula Na₂{[Cu₂(mpba)₃][Cu(Me₅dien)]₆}-(ClO₄)₆·12H₂O (1), Na₂{[Cu₂(Mempba)₃][Cu(Me₅dien)]₆}(ClO₄)₆·12H₂O (2), Na₂{[Ni₂(mpba)₃]-[Cu(Me₅dien)]₆}(ClO₄)₆·12H₂O (3), Na₂{[Ni₂(Mempba)₃][Cu(Me₅dien)]₆}(ClO₄)₆·9H₂O (4), {[Ni₂(mpba)₃][Ni(dipn)(H₂O)]₆}(ClO₄)₄·12.5H₂O (5), and {…
The influence of microstructures of Cu wires on electromigration (EM) resistance has been investigated using Cu wires with various line widths from 50 to 280 nm and line heights of 300 nm or 500 nm. A strong line width dependence of median time to failure was observed as the EM resistance decreases substantially with…
Satranidazole, a potent broad spectrum antiprotozoal, is a poorly water-soluble drug and has low bioavailability on oral administration. One of the important methods to improve the solubility and bioavailability of a less water-soluble drug is by the use of cosolvents. The solubility enhancement produced by binary ble…